TSC2102 datasheet(20/54 Pages) TI

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TSC2102

SLAS379A− APRIL 2003 − REVISED JUNE 2004

www.ti.com

800

900

1000

1100

1200

1300

1400

−40

−20

Applied Temperature (deg. C)

Figure 15. Typical Plot for Single Measurement Method

150

160

170

180

190

200

210

220

230

240

−40

−20

Applied Temperature(deg. C)

Figure 16. Typical Plot for Differential Measurement Method

Temperature measurement can only be done in host controlled mode.

Battery Measurement

An added feature of the TSC2102 is the ability to monitor the battery voltage at the input side of a voltage regulator (LDO

or dc/dc converter), as shown in Figure 17. The battery voltage can vary from 0.5 V to 6 V while maintaining the analog

supply voltage to the TSC2102 in the range of 2.7 V to 3.6 V. The input voltage (VBAT1 or VBAT2) is divided down by a

factor of 6 so that a 6.0-V battery voltage is represented as 1.0 V to the ADC.It is advisable to add a series resistor of 200

to 300

Ω while connecting the battery terminal to the input pin (VBAT1 or VBAT2) as shown in Figure 17. Thus, the resultant

voltage converted by the ADC is given by:

Vconv +

2.0K

12.0K

) R

battery

The internal resistors, which make up the resistor divider, are subject to

±20% device-to-device variation. In order to

minimize power consumption, the divider is only on during the sampling of the battery input.

TSC2102 Datasheet(PDF) 20 Page - Texas Instruments

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